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1.故障现象在对1台10t桥式起重机进行安全检查时发现,该起重机右侧主梁上的小车轨道出现长25mm的断口。该起重机的小车轨道由3段钢轨拼接而成,自左至右,长度分别为6m、6m与1.75m,发生断口的位置正处于6m和1.75m两段轨道的拼接处。出现断口后,压板与1.75m长轨道的焊接出现开裂,如图1
1. Symptom In a 10t overhead crane safety inspection found that the crane on the right side of the main girder track 25mm long fracture appeared. The crane’s trolley track is composed of 3 sections of steel rails spliced from left to right with lengths of 6m, 6m and 1.75m respectively. The fracture location is at the splicing place of two sections of 6m and 1.75m rails. After the fracture occurs, the plate and 1.75m long orbit welding cracking occurs, as shown in Figure 1